PADI Open Water Test Questions with 100% Verified Correct Answers What is the most important rule of scuba diving? - Correct Answer Do not hold your breath Breathe continuously What are the consequences of breaking the most important rule in scuba diving? - Correct Answer Lung over expansion severe injuries, death What is a reverse block? - Correct Answer pain and discomfort caused by expanding air trapped inside an air space during ascent What should you do if you feel discomfort during ascent due to air expansion in the ears, sinuses, stomach, intestines, or teeth? - Correct Answer slow or stop ascent descend a metre/few feet and give the trapped air time to work its way out How does increasing depth affect how long your air supply lasts? - Correct Answer the deeper you descend, the denser the air becomes.It takes 4X the effort to breathe twice as fast What's the most efficient way to breathe dense air underwater? - Correct Answer take deep, slow breaths Why does a diver need a mask? - Correct Answer creates an air space, so your eyes can focus As you go deeper, you consume air from your scuba cylinder _____ - Correct Answer faster Why does the mask need to enclose your nose? - Correct Answer to equalize during your descent to prevent mask squeeze 1 / 2
What 6 features should you look for in a mask? - Correct Answer 1) tempered glass 2) comfortable skirt with a good seal 3) nose or finger pockets 4) low profile 5) Adjustable strap that can be locked in place 6) wide field of vision When buying a mask, what are the 2 most important features? - Correct Answer fit and comfort How do you prepare a new mask for use? - Correct Answer use a soft cloth with a low abrasion cleaner to remove the protective chemical adjust the strap What 3 general maintenance procedures apply to mask care? - Correct Answer 1) rinse thoroughly with fresh H2o 2) keep out of direct sunlight 3) store in a cool, dry place Why does a diver need a snorkel? - Correct Answer 1) lets you rest or swim with your face in the water, without wasting cylinder air 2) makes it easier to breathe when the surface is rough 3) makes it easier to swim back, when you are running low on air What 3 features does an easy-breathing snorkel have? - Correct Answer 1) large diameter (bore) 2) Not excessively long 3) Designed with smooth, rounded bends How do you prepare a snorkel for use? - Correct Answer 1) attach it to the left of your mask 2) Adjust snorkel keeper, so the top of the snorkel sits at the crown of your head with the mouthpiece in place
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